Audition: Advanced Topics

The Head in Sound Space.
Illustration of how sound the travelling of sound to the two ears can
play a role in determining direction.

Time of Arrival and Phase.
Use headphones to experience how the time of arrival or difference in
phase between the two ears can be an a cue to the direction of the
sound.

Relative Loudness.
Use headphones to illustrate to how the relative intensity of sounds in
the two ears can influence the perception of direction of a sound.

Illusions

Shepherd Scale
Illusion. Just as a staircase can be drawn that always appears
to ascend and repeat itself, so Roger Shepherd devised a set of tones
that can be played in a scale that repeats itself. Each tone
appears to be the next higher note in the scale and yet the scale
repeats. Try it out here.